We needed to rename our app, but keep the app id.
Apple advised us that for renaming app, we need to remove it from store and create a brand new app. We did just that, but now when trying to create a new app, it wont let us use the app identifier, OR even to remove it and create a new identical one.
How can we achieve renaming of our app AND keeping the app id?
Our app id is super important to us because we also use it to connect to other services like FCM.
We already renamed our android app, which of course was easy and straightforward...
Apple advised us that for renaming app, we need to remove it from store and create a brand new app.
That doesn't sound right to me. Did they tell you that in an email that you can quote here?
According to https://developer.apple.com/help/app-store-connect/reference/app-information
"Name .... It can be edited until you submit the app to App Review. Later, you can change the name when you create a new version"
Now that you have deleted the app, I'm not sure what you can do.